Fornia



G. l. LEONARD.

REFRIGEHATING APPARATUS.

APPLICATION FILED APR. I6. 1914.

Patented Aug. 1, 1916.

2 SHEETS-SHEETl Sii" .IN1/Wina G. I. LEONARD.

REFRIGERATING APPARATUS.

APPLICATION HLED APR.16.1914.

A 9 A @39 A A Patented Aug. A, 1916.

2 SHEETS-SHEET 2.

GEORGIE I. LEONARD, 0F LOS ANGELES, CALIFORNIA, ASSIGNOR TO LEONARDROTARY PUMP CORPORATION, 0F LOS ANGELES, CALIFORNIA, A CORPORATION OFCALI- JFORNI.

REFRIGERATING APPARATUS.

Specification of Letters Patent.

Patented Aug.. 1, 1916.

Application led April 16, 1914:. Serial No. 832,367.

To all whom t may concern Be it known that I, GEORGE I. LEONARD, a.citizen of the United States, residing at Los Angeles, county of LosAngeles, and State of California, have invented a new and usefulRefrigerating Apparatus, of

vwhich the following is a specification.

My presenttinvention rela-tes to an improvement in refrigeratingapparatus of the type exemplified in Letters Patent of the United StatesNo. 1,086,675, dated Febru ary 10, 1914:; and it relates moreparticularly to improvement of the machine of said' painsioin-chambershown in Fig. l and Fig.

5 1s a View diagrammatically showing the whole apparatus.

The tank or casing .4 for containing the sealing and refrigeratingliquids employed, and-which is represented as. being supported on a hase22, is of thepreferred form shown and .is provided with a head fastenedin place by screw-bolts and carrying a pressure-gage.

About an opening in one side of the tank, near its .lower end, is'formedan outwardly projecting Harige 25. 'The pump herein.

represented is of the kind shown and described in the aforesaid LettersPatent, in volving an `open case 5 containing intermeshing gears 7mounted on shafts. 0n the outer end vof the pump-case 5 isformed adahige 19, which is bolted to the face of the Harige 25 to support thepump stably in its operative position, wherein it seats in the 4tlangeand projects horizontally through the,l tank-wall into the tank near itsbottom. A

head 6 is bolted to and closes the inner end of the pump-case and adordsbearing for the corresponding ends of the two gearshafts, one of which,denoted by the reference numeral 8, extends through a stungbox or gland9 on the outer end of rthe case 5 and alines with and is coupled to theshaft of an electric motor 20 supported on the base 22, as shown inFig. 1. A. suction or illustrated in Fig.

intake suction-line leads containing an upwardly opening check-valve 11;and a branch pipe 12 connects this line at a point below the check-valvetherein with a pipe 18 leading from a valve expansion-chamber clearly iand the construction and operation of which are hereinafter described.A. valved pipe 13, for the pressureline, leads from the tank to thisexpansionchamber for carrying the refrigerant thereto. Arefrigeratoncoil or chamber not shown) is to be interposed between thepipe containing the check-valve 11 and a pipe 17 leading from theexpansion-chamber. As means for condensing the refrigerant in the tank,a coil 14: is shown depending therein from its head,'through which thecoil-ends pass, with one of which, that denoted by the reference-numeral21, connection may be made with a suitable water-supply for{iowingfcondensmg water through the coil.

he level of the sealing liquid in the tank 1s indicated at 23 and thatof the refrigerant is indicated at- 24, in Fig. 1.

The manner thus described for combining the rotary pump with the tankgreatly simplifies and cheapens the construction while stably supportingthe pump in its operative position without other support for thepurpose; and, besides, it facilitates assembling and Separation of theparts.

The valved exlpiansion-chamber involves a casing preferably formed intwo parts, as shown, screwing together to clamp between them a diaphragm1G having secured to its center a needle.-valve 15u. The needle-valvecontrols a minute orifice or port 15 in a valve-seat 15b in the innerend of a nipple 13", at which the pressure-pipe 13 is connected with theexpansion-clulmber at the side of the diaphragm from which the pipe 17of the suction-line extends. A. nipple 1S is provided on the )art of thecasing at the opposite side of tie diaphragm, for connecting therewiththe pipe 18, which is to be understood vas being connected with thebranch-pipe 12, of which it is intended to be a. continuation.

In the operation of the apparatus, working of the motor 20 to act-natethe pump circulates the liquid refrigerant fro'in the tank through thecirculating system, thus through the pressure line 13 into the expansionchamber, whence it passes by way of thel port is provided at 10, towhich aA pipe 17 through the aforesaid refrigeratorcoil and enters, inexpandedvor gaseous condition, by way of the pipe containing theupwardly-seating check-valve 11, past thel liquid in the tank to becooled and liquefied` by the relatively loW temperature in the latterproduced by the condenser 1-1. The liquefied' refrigerant rises'throughand surmounts the sealing liquid ,'being of lesser gravity than -thelatter.; though it may, obviously, beof a relatively heavy variety,causing it to sink beneath lthe sealing liquid to be taken thence intothe pressure-line of the apparatus. lVhile the pump is thus operating,the suction it exerts on the line 1Q, 18 operates the diaphragm 16towithdraw the needle-valve 15a andslightlyopen the port 15 foradmission of the refrigerant from Ythe pressure line into theexpansion-chamber. When the pump stops, the pressure inI the tank forcesthe sealing liquid through the pump and by way of the line 12, 18 intothe chamber behind the diaphragm to exert pressure against the latter toclose the needle-valve and stop circulation of the rerigera-nt; andwl1en 'the pump is again .n started, its suctionaction on the line 12,18

withdraws this pressure and restores eulation. v

The valved expansion-chamber thus renders the apparatusk automatic initsoperation', avoiding all necessity of turning on and off byhand,since the needle-valve is set to operate under a given amount of work tobe performed. This is of importance, because if the valve did not close,the entire system of cooling-pipes would lill with the refrigeratingliquid-and thusnthrow a heavy load on the, motor and pump in evaporatingott the large body of refrigerant before the regular the cirexpansionwould takeplace under' the control ofthe needle-valve.

In order to effect-a better sealing action on the pump, l provide oneyor more holes 26 (Fig. 2) through the pump-case at a suitable pointbetween the intake and exhaust-ports to admit a small portion of. thesealing liquid from the pressure side.

Any suitable refrigerant may be used, for operating my improvedapparatus, of a gravity so dill'ering from that of the sealing liquid.that it will rise above or sink below the latter. rl`hus rhigolene Workswell as the refrigerant with glycerin as thesealing liquid; ammonia maybe used as there- :trigerant with a .suitable oil for sealing; and

uf sulfur dioxid may be. used as the refrigerant with oil, but beingheavier than the oil will sink beneath it and have to be taken into thepressure-line from below the oil-body.

What I claim as new and desire to secure by Letters Patent is 1. In arefrigerating apparatus employing an expansible fluid refrigerant, thecombination of a tank having a pressure-outlet and a side-openingprovided with an outer flange forming a pump-seat, a rotary motordrivenpump having a flange. on the outer end of its case and seating in saidtankflange to extend said case horizontally into the tank with thecase-flange abutting against and secured to the tank-flange face, saidpump having an outlet within the tank and an intake, and a circulatingsystem tor the refrigerant connecting said pressure-outlet with thepump-intake.

Q. In a refrigerating apparatus employing an expansiblefluid'refrgerant, the com= bination of al tank having a pressure-outletand a side-opening provided with an outer flange forming a pump-seat, arotary motordriven pump, having a flange on the outer end of its caseand seating in said tankflange to extend said case horizontallv into thetank with the case-flange abutting against and secured to thetai'ik-{lange face, said pump having an outlet within the tank and anintake, a head secured to the inner end of the pump-case and formingbearings for shafts of the rotary-pump members, and a circulating systemfor the refrigerant connecting said pressure-outlet with the pumpintake.

3. In a refrigerating apparatus employing an expansible fluidrefrigerant and a sealing liquid. the combination of a tank forcontaining said refrigerant and liquid and having a pressure-outlet, arotary motordriven pump in the tank and having its outlet therein and anintake, a pressure-line leading from said pressure-outlet., a valveseatat the discharge-end of said line containing a minute orifice, a casingcontaining a. chamber connected with said dischargeend, a diaphragm insaid easing dividing it into chambers and carrying a needle-valve forcontrolling said orilice, a suction-line leading to the pump-intake fromthe chamber at one side of the diaphragm and containing a check-valve,and a branch suctionline connecting said suction-line between thecheck-valve and the pump with the chamber at the opposite side of thediaphragnn.

GEORGE l. LEONARD. Witnesses:

Dnssa WiLLrAMs, E. M. Hamvoon.

